const test = function () {
  console.log(1);
};
var obj = {
  say: function () {
    // 包裹在对象里面
    console.log('say log 哈哈哈');
  }
};
function gogo() {
  let a = 1;
  console.log(a);
  return function () {
    console.log(222);
  };
}